Question

Which represents a deletion of the section of DNA shown here? A—C—T—G—G—A—T A. A—C—T—G—G B. A—G—C—T—G—G—T C. A—C—T—T—G—A—T D. A—C—G—G—C—T—T

Answer 1

A

Step-by-step explanation:

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Answer 2

The easiest way to tell is to line them all up in a column.

A - C - T - G - G - A - T
A - C - T - G - G
A - G - C - T - G - G - T
A - C - T - T - G - A - T
A - C - G - G - C - T - T

The shortest one will be a deletion. This is answer A. The last two letters in the sequence (A and T) have been removed.